How can the code snippet be optimized to prevent potential memory leaks in PHP?

Memory leaks in PHP can be prevented by explicitly freeing up memory allocated for objects when they are no longer needed. This can be done using the `unset()` function to remove references to objects and allow the garbage collector to reclaim the memory they were using. By properly managing memory usage in this way, potential memory leaks can be avoided.

// Instantiate the object
$object = new SomeClass();

// Use the object

// Free up memory by unsetting the object
unset($object);